The gain on your trailer brake controller must be set every time your trailer’s weight changes. The gain is what adjusts the amount of braking force that the electric brakes provide. If not set correctly, it could create a dangerous situation. Too little gain will mean that the trailer’s brakes won’t provide enough stopping power; too much gain and the brakes may lock up, leading to possible loss of control of the vehicle. Adjusting the gain on the brakes can be done quickly under the right road conditions.
Move the gain control to the 50 percent mark or the center position on the slider.